Microscope



H. F. KURTZ MICROSCOPE Sept. 21, 19s7.

Filed Sept. 29, 1934 INVENTOR HENRY F. KUR-T Z BY ATTORNEY tier.

. ATE

MICROSCOPE Henry F. Kurtz, Rochester, N. Y., assignor t Bausch & Lomb Optical Company, Rochester, N. Y., a corporation of New York UNITED star Application September 29, 1934, Serial No. 746,235 8 Claims. (01. se -a9) The present invention relates to microscopes nallythrough the tube l and is journaled in the and more particularly to mechanisms for efiecttapered bearing [6 and in the collar 20. A ing a fine adjustment for focusing the instruknurled knob 23 is fastened to each end of the ment. shaft 2i by a screw'M and a set screw 25 in each 5 One of the objects of this invention is to proob e tendS into a keyway 26 in the Sha t t0 Vide afine adjustment mechanism for a mioroprevent relative rotation between the shaft and scope which will be compact and simple of structhe knob. A washer 21 is located between each ture yet eflicient in operation. Another object knob 23 and the adjacent membeh h Shaft of my invention is to provide a fine adjustment formed i a limiting Shoulder 23 a ja l0 mechanism which can be assemmed and fitted thetapered bearing l8 anda washer 29 is located as a unit and then readily inserted into the arm b w n thi shoulder n e bearingof the instrument. These and other objects and Threaded 0n the portion 22 0f the Shaft 2| advantages reside in certain novel features of Within the b s a block 39 Which has plane construction, arrangement and combination of pelellelsides 3! engaging the Plane parallel Wells parts as 1 her i after be more fully described 32 of a slot in the tube l5. Thus rotation of the and pointed out in the appended c1a,im5 shaft 2i will cause sliding movement of the block Figure 1 is a side elevation of a microscope 3i longitudinally of the tube l5. Adjacent the embodying my invention ha i g rt b k ends of the threaded portion 22, the shaft 2i is away. p provided with lugs. 33 which engagethe exten- Fig. Zis an enlarged fragmentary section taken sions 35 on the block 36 to stop rotation of the e on line 2-2 of Fig.1. shaft 2| without injury to the threaded portion.

Fig. 3 is a fragmentary section taken on line bracing member 35 is located dj e t 33 of Fig. 1. the open end of the tube l5 and extends intothe Fig. 4 is a section take on line a 4 of Fig. 2. l fitting g y t in t p ev nt th c l- Fig. 5 is a sectional view similar to Fig. 4, of a h 0f e p end of the b W by 0 form of pivot.

modified block and guide. V lar 2E3.

Fig. 6 is a top plan view of an th modified The sliding block 30 has a notch 36 into which form of block. extends an arm 3'! of a lever pivoted on a knife Fig. '7 is a side elevation of the block shown in edge 38 Which is fastened to a p j tion 39 on Fig. 6. i the inside of the hollow arm It. The other arm Fig. 8 is a fragmentary vi of modified M! of lever 31 has a recess M for receiving a pin 42 upon which rests the extension 43 fixed to One preferred form of my invention is shown in t the Slide i i and having a notch 44 for receiving the drawing wherein I0 designates a microscope the pin body tube l2. The usual knob I3 is provided to is fastened to the lower end of the Slide H y effect the coarse adjustment of the tube for fo- SCTeWS e a Compression Spring 43 hav cusing as is well known to those skilled in the a guide 9 beers w w y against the u r art. i end of the extension it. The spring 48 serves to For the fine adjustment; the hollow arm I!) is take up y p y n the fin m nt mechasurrounds the tube l5 and abuts the shoulder It! provided with two aligned apertures l4 through D due to the length and DOSitiOH f the which extends a cylindrical tube l5 hi h 1 extension 16, serves to balance the weight of the formed at one end as a tapered bearing member body b and counteract y n y. of he IS having a shoulder H. A cylindrical collar [8 Slide t bind jam in the guideweys 0f t e l1 and the arm H] to limit the insertion of said In the modification Shown in 5 e b ock tube 15. A pin It extends through the shoulder 59 is m m h r w t n he slo in the l1 and the collar [8 and into the am In f r tube l5 and amember M is inserted into the block properly positioning the tube l5 and for preventt0 be r against t Wa s T e member 5! 5 ing rotation thereof. The other end of the tube y b either a plate a pin F l5 extends through the arm l0 and has a collar A e fi d form f s d b ck iS Shown 20 threaded thereon which abuts the arm l0 and in Figs- 6 and The blOek 52 is provided w h serves to clamp the tube l5 securely to th arm a transverse cut 53 and a longitudinal cut 54 extending from the transverse cut 53 to the end of Ill.

55 A shaft 2|. threaded at 22, extends longitudithe block. A screw 55 will spread the two secarm on which is mounted a Slid ll carrying v A bracket 45 having a horizontal extension 46 3 tions formed by the cuts to insure a close fit between the walls 32 of the slot in tube i5.

Fig. 8 shows a modified pivot for the lever in which a shaft 56 is substituted for the knife edge 38 and the ring 57 of the lever completely encircles the shaft 56.

In assembling the fine adjustment according to my invention, the parts requiring accurate positioning can be so positioned outside of the microscope arm. The shaft 2i is positioned in the bearing l6 and the block 39 is positioned within the guideways 32 and on the threaded portion 22, and the tube l carrying this assembly is then inserted through the aperture l4 into the arm. There is no need for extreme precision in the fitting of the lever 37 or pin ll, all of the precision parts being within the tube l5. Thus it is apparent that the fine adjustment mechanism may be easily and rapidly mounted in the microscope by relatively unskilled workers and yet be smooth and accurate in operation.

From the foregoing it is apparent that I am able to attain the objects of my invention and provide a fine adjustment mechanism for a microscope which is compact and simple of structure yet efiicient in operation and can be easily and readily manufactured and assembled. Ob-- viously various modifications can be made without departing from the spirit of my invention.

I claim:

1. In a microscope having an arm and a body tube slidably mounted thereon, means for moving said body tube comprising a hollow member having a longitudinal parallel sided slot, a screw extending longitudinally through said member, a nut threaded on said screw, means cooperating with said slot to prevent rotation of said nut, a lever pivotally mounted in said arm, and means operatively connecting said lever and said body tube, said nut and said lever cooperating, through said slot, to actuate said last-named means to move said body tube.

2. In a microscope having an arm and a body tube slidably mounted thereon, means for moving said body tube comprising a hollow cylinder having a parallel sided longitudinal slot, a screw rotatably mounted in said cylinder and extending longitudinally therethrough, a travelling member threaded on said screw, means cooperating with said slot to prevent rotation of said travelling member, a lever member pivotally mounted in said arm, and means operatively connecting said lever and said body tube, one of said members extending through said slot into contact with the other whereby rotation of said screw will cause pivotal movement of said lever member to actuate said last-named means and move said body tube.

3. In a microscope, a supporting arm, a body tube slidably mounted on said arm, a lever having one arm supporting said body tube, a cylindrical tube extending through said arm and having a longitudinal parallel-sided slot, bearings at each end of said tube, a shaft journalled in said bearings, a nut threaded on said shaft between said bearings, means on said nut cooperating with said slot for preventing rotation of said nut, means on said nut engaging the other arm of said lever, and means for rotating said shaft.

4. In a microscope, a supporting arm, a body tube slidably mounted on said arm, a lever having one arm supporting said body tube, a cylindrical tube extending through said arm and having a longitudinal parallel-sided slot, bearings at each end of said tube, a shaft journalled in said bearings, a nut threaded on said shaft between said bearings, means on said nut cooperating with said slot for preventing rotation of said nut, means on said nut engaging the other arm of said lever, means for rotating said shaft, and cooperating means on said nut and on said shaft for limiting the travelling movement of said nut.

5. In a self-contained fine adjustment mechanism, a tube having a longitudinal, parallelsided slot, a hearing at each end of said tube, a shaft journalled in said bearings, said shaft being threaded between said bearings, a nut mounted on said shaft between said bearings, a member extending through said nut and having bearing engagement with the sides of said slot to prevent rotation of said nut, and means for rotating said shaft.

6. In a self-contained fine adjustment mechanism, a tube having a longitudinal, parallelsided slot, a bearing at each end of said tube, a shaft journalled in said bearings, said shaft being threaded between said bearings, a nut mounted on said shaft between said bearings, a extending through said nut and having engagement with the sides of said slot to rotation of said nut, means for rotating said shaft, and cooperating means on said nut and said shaft for limiting the travelling movement of said nut.

'7. In a self-contained fine adjustment mechanism, a tube having a longitudinal parallel-sided slot, a bearing at each end of said tube, a journalled in said bearings, said shaft threaded between said bearings, a nut mounted on said shaft between said bearings, said nut having a T-shaped slot adjacent one end forming two separable sections, means for separating said sections to insure close engagement between said sections and the sides of said slot, and means for rotating said shaft.

8. In a self-contained fine adjustment mechanism, a tube having a longitudinal parallel-sided slot, a bearing at each end of said tube, a shaft journalled in said bearings, said shaft being threaded between said bearings, a nut mounted on said shaft between said bearings, said nut having a T-shaped slot adjacent one end forming two separable sections, means for separating said sections to insure close engagement between said sections and the sides of said slot, means for rotating said shaft, and means for limiting the longitudinal travel of said nut on said threaded shaft.

HENRY F. KURTZ. 

